71 lines
2.1 KiB
C
71 lines
2.1 KiB
C
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/*
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* ALSA interface to ivtv PCM capture streams
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*
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* Copyright (C) 2009,2012 Andy Walls <awalls@md.metrocast.net>
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* Copyright (C) 2009 Devin Heitmueller <dheitmueller@kernellabs.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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struct snd_card;
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struct snd_ivtv_card {
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struct v4l2_device *v4l2_dev;
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struct snd_card *sc;
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unsigned int capture_transfer_done;
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unsigned int hwptr_done_capture;
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struct snd_pcm_substream *capture_pcm_substream;
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spinlock_t slock;
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};
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extern int ivtv_alsa_debug;
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/*
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* File operations that manipulate the encoder or video or audio subdevices
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* need to be serialized. Use the same lock we use for v4l2 file ops.
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*/
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static inline void snd_ivtv_lock(struct snd_ivtv_card *itvsc)
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{
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struct ivtv *itv = to_ivtv(itvsc->v4l2_dev);
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mutex_lock(&itv->serialize_lock);
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}
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static inline void snd_ivtv_unlock(struct snd_ivtv_card *itvsc)
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{
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struct ivtv *itv = to_ivtv(itvsc->v4l2_dev);
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mutex_unlock(&itv->serialize_lock);
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}
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#define IVTV_ALSA_DBGFLG_WARN (1 << 0)
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#define IVTV_ALSA_DBGFLG_INFO (1 << 1)
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#define IVTV_ALSA_DEBUG(x, type, fmt, args...) \
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do { \
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if ((x) & ivtv_alsa_debug) \
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pr_info("%s-alsa: " type ": " fmt, \
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v4l2_dev->name , ## args); \
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} while (0)
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#define IVTV_ALSA_DEBUG_WARN(fmt, args...) \
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IVTV_ALSA_DEBUG(IVTV_ALSA_DBGFLG_WARN, "warning", fmt , ## args)
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#define IVTV_ALSA_DEBUG_INFO(fmt, args...) \
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IVTV_ALSA_DEBUG(IVTV_ALSA_DBGFLG_INFO, "info", fmt , ## args)
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#define IVTV_ALSA_ERR(fmt, args...) \
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pr_err("%s-alsa: " fmt, v4l2_dev->name , ## args)
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#define IVTV_ALSA_WARN(fmt, args...) \
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pr_warn("%s-alsa: " fmt, v4l2_dev->name , ## args)
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#define IVTV_ALSA_INFO(fmt, args...) \
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pr_info("%s-alsa: " fmt, v4l2_dev->name , ## args)
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